Nathan I Partain

Insider

First SEC filing: Jan. 6, 2021 · Latest: Jan. 23, 2024

On this page

Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Derivatives Options and other derivative holdings reported by this person.
Initial holdings The stakes this person held when they first started reporting.

Insider at

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 14 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

14 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
April 13, 2026	OTTR	A	2,000	—	—	10,969 Direct	+22.30%	Acquired	(price as of 2026-08-20)
April 11, 2016	OTTR	A	2,900	—	—	47,372 Direct	+6.52%	Acquired	(price as of 2026-08-20)
April 13, 2015	OTTR	A	1,900	—	—	42,715 Direct	+4.66%	Acquired	(price as of 2026-08-20)
April 14, 2014	OTTR	A	2,100	—	—	39,306 Direct	+5.64%	Acquired	(price as of 2026-08-20)
April 8, 2013	OTTR	A	2,000	—	—	35,806 Direct	+5.92%	Acquired	(price as of 2026-08-20)
Sept. 21, 2012	DNP	X	110,992	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Sept. 21, 2012	DNP	X	13,874	$9.57	$132,774	44,186 Direct	+45.77%	Acquired	14.7% (price as of 2026-08-20)
Sept. 21, 2012	DNP	X	30,112	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Sept. 21, 2012	DNP	X	3,764	$9.57	$36,021	34,076 Direct	+12.42%	Acquired	14.7% (price as of 2026-08-20)
April 16, 2012	OTTR	A	3,000	—	—	32,372 Direct	+10.21%	Acquired	(price as of 2026-08-20)
Oct. 3, 2011	DPG	P	2,000	$17.93	$35,860	2,000 Direct	—	Acquired	-17.4% (price as of 2026-08-20)
April 27, 2011	DNP	P	750	$9.63	$7,222	27,147 Direct	+2.84%	Acquired	14.0% (price as of 2026-08-20)
April 27, 2011	DNP	P	250	$9.63	$2,408	26,397 Direct	+0.96%	Acquired	14.0% (price as of 2026-08-20)
April 11, 2011	OTTR	A	3,000	—	—	27,925 Direct	+12.04%	Acquired	(price as of 2026-08-20)
April 12, 2010	OTTR	A	3,100	—	—	23,713 Direct	+15.04%	Acquired	(price as of 2026-08-20)
Nov. 27, 2009	OTTR	M	2,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 27, 2009	OTTR	M	2,000	$19.75	$39,500	20,157 Direct	+11.02%	Acquired	367.0% (price as of 2026-08-20)
May 26, 2009	DNP	P	1,500	$7.58	$11,370	23,208 Direct	+6.91%	Acquired	44.9% (price as of 2026-08-20)
May 26, 2009	DNP	P	4,000	$7.59	$30,360	21,708 Direct	+22.59%	Acquired	44.7% (price as of 2026-08-20)
Jan. 2, 2009	DNP	P	3,500	$6.25	$21,875	17,030 Direct	+25.87%	Acquired	75.7% (price as of 2026-08-20)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II)

Options, RSUs and convertible securities reported on Form 4 Table II.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
Sept. 21, 2012	DNP	Subscription Rights (right to buy)	Common stock (13,874)	—	Sept. 21, 2012	110,992	Disposed
Sept. 21, 2012	DNP	Subscription Rights (right to buy)	Common stock (3,764)	—	Sept. 21, 2012	30,112	Disposed
Nov. 27, 2009	OTTR	Stock Options (right to buy)	Common Stock (2,000)	$19.75	April 10, 2010	2,000	Disposed

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 1 holding

Securities held when first becoming an insider, per SEC Form 3.

Date	Ticker	Security	Shares	Ownership
Jan. 6, 2021	NWN	Common Stock	7,000	Direct